In each of the following situations, determine whether the variable involved is a dominant variable:

a. Games lost in year t in an equation for the number of games won in year t by a baseball team that plays the same number of games each year

b. Number of Woody’s restaurants in a model of the total sales of the entire Woody’s chain of restaurants

c. Disposable income in an equation for aggregate consumption expenditures

d. Number of tires purchased in an annual model of the number of automobiles produced by an automaker that does not make its own tires

e. Number of acres planted in an agricultural supply function